High Altitude Operation - PowerLand PD2000 Owner's Manual

High Altitude Operation

At high altitude, the standard carburetor air/fuel mixture will be too rich. Performance will
decrease, and fuel consumption will increase. A very rich mixture will also foul the spark plug
and cause hard starting. Operation at an altitude that differs from that at which this engine was
certified, for extended periods of time, may increase emissions.
High altitude performance can be improved by specific modifications to the carburetor. If you
always operate your generator at altitudes above 5,000 feet (1,500 meters), have your dealer
perform this carburetor modification. This engine, when operated at high altitude with the
carburetor modifications for high altitude use, will meet each emission standard throughout its
useful life.
Even with carburetor modification, engine horsepower will decrease about 3.5% for each
1,000-foot (300-meter) increase in altitude. The effect of altitude on horsepower will be greater
than this if no carburetor modification is made.
NOTICE: When the carburetor has been modified for high altitude operation, the air/fuel
mixture will be too lean for low altitude use. Operation at altitudes below 5,000 feet
(1,500 meters) with a modified carburetor may cause the engine to overheat and
result in serious engine damage. For use at low altitudes, have your servicing dealer
return the carburetor to original factory specifications.
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